改良型多点进水多级A/O系统运行模式的优化  

Optimization of Operation Mode of Modified Step Feed-Multistage A/O System for Sewage Treatment

作　　者：王博文 马华继 潘辉[3] 汪艳宁[1,2] 张世泽 苑宏英[1,2] 穆荣 张然 WANG Bo-wen;MA Hua-ji;PAN Hui;WANG Yan-ning;ZHANG Shi-ze;YUAN Hong-ying;MU Rong;ZHANG Ran(Tianjin Key Laboratory of Aquatic Science and Technology,School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;Municipal Experimental Teaching Demonstration Center of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;Department of Architecture and Civil Engineering,Hebei Construction Material Vocational and Technical College,Qinhuangdao 066000,China)

机构地区：[1]天津城建大学环境与市政工程学院天津市水质科学与技术重点实验室,天津300384 [2]天津城建大学环境与市政市级实验教学示范中心,天津300384 [3]河北建材职业技术学院建筑工程系,河北秦皇岛066000

出　　处：《中国给水排水》2025年第5期8-17,共10页China Water & Wastewater

基　　金：国家重点研发计划“政府间国际创新合作”重点专项(2019YFE0122400);天津市科技计划项目(23YDTPJC00900);天津城建大学校企合作项目(KHX2020-5);天津城建大学大学生创新训练计划项目(2024107982072)。

摘　　要：通过建立改良型多点进水多级A/O小试系统,以模拟生活污水为处理对象,先后采取3段模式和2段模式进行连续运行,研究了不同模式下系统的工艺性能、活性污泥沉降性能和生物活性,以及优化模式下系统的物料平衡。结果表明,在2段模式下系统出水水质满足国家一级A排放标准;系统对总氮和总磷的去除率分别为82.80%和92.98%,均高于3段模式。系统内活性污泥的沉降性能良好,SV和SVI的平均值分别为36.80%和80.74 mL/g,不会发生污泥膨胀;而在3段模式下运行则容易发生丝状污泥膨胀,导致运行失败。2段模式下的污泥活性高于3段模式,比释磷速率、比反硝化速率、比硝化速率和比摄磷速率分别为0.77、3.99、1.12和0.21 mg/(g·h),分别是3段模式下对应污泥活性的1.33、4.56、1.30和1.90倍。2段运行模式更适合改良型多点进水多级A/O系统。2段模式下,系统的COD、N和P物料平衡率分别为93.81%、97.79%和83.77%;系统脱氮所消耗的碳源为5.25 g/g,第一段和第二段脱氮所消耗的碳源分别为4.12和6.65 g/g;厌氧释磷所消耗的碳源为11.29 g/g。The bench-scale modified step feed-multistage A/O system was set up to treat synthetic sewage.It was operated successively with three-stage mode and two-stage mode.The process performance,settleability and bioactivity of activated sludge,and mass balance of process system under optimized operation mode were investigated.The results showed that the effluent water quality under twostage mode could stably met the requirements of classⅠ-A in GB 18918-2002.The removal efficiencies of TN and TP under two-stage mode were 82.80%and 92.98%,respectively.They were both higher than those under three-stage mode.The settleability of activated sludge was desirable.The average sludge settling volume(SV)and sludge volume index(SVI)were 36.80%and 80.74 mL/g,respectively.There was no filamentous bulking.While the filamentous bulking arose easily under three-stage mode,which could result in the operation failure.The bioactivity of activated sludge under two-stage mode was higher than that under three-stage mode.The specific phosphorus release rate,specific denitrification rate,specific nitrification rate,and specific phosphorus uptake rate were 0.77 mg/(g·h),3.99 mg/(g·h),1.12mg/(g·h),and 0.21 mg/(g·h),respectively.They were 1.33 times,4.56 times,1.30 times,and 1.90 times of those under three-stage mode.Compared with three-stage mode,the two-stage mode was desirable for the modified step feed-multistage A/O system.The balances of COD,nitrogen and phosphorus were 93.81%,97.79%and 83.77%,respectively.The carbon sources consumed for nitrogen removal was 5.25 g/g,and it was 4.12 g/g for the first stage and 6.65 g/g for the second stage.The carbon sources consumed for phosphorus removal was 11.29 g/g.

关 键 词：多点进水多级A/O工艺 脱氮除磷 沉降性能 生物活性 物料平衡 

分 类 号：TU992[建筑科学—市政工程]